U-bolt construction



' Patented Apr. 22, 1 930 EDWIN. W. GQESEB QF Los- NGELEs,oAmF RmeQAssiGNo o nlvrsoo: E RICK la Y'GOMLBANYK, OE LOS ANGELES, GAI1IEORNLIA, Av CGRPOLRATION or ce m- :EQU MENT- FQRNIAT U BoILT. CONSTRU TION- i Ap lieatidn. file i nee mber 27; 1927;. serial No; 242,943..

MVUiIIVGIIfiOII relates to d'eep Wei-l drilling equipment-and more particularly to crown blocks 1 employedtherein.

Indrflli-Iig a deep'well, a derrick is'jset up V .=W1th.itS vertical axis iira'Iigmnent with the proposed Well. The tools and casing used in the drilling of the weli'" arehaild led'byy a derrick tackle 7 including "a crown block mounted on-"the top of -the derrick, a traveling-block -QqfldflPtGdtO move vertically-between the floor of the derrick and the crown "block, and. a

cable Wound about the sheaveseotthe'crown block" and travelingblock; andl reeled-i1p by a p0wer operated draw'works-drum.

' I I n the crown b1bcks in-comm'on use, the

sheavesj are"mounted upon asingle shaft Whichfis supportedat itsgop'posit-e ,ends where] I slightly 'fiatt-ened portions of the shaft rest condition. 1 Itis; therefore, necessary-tore:

uponup'per edgesof siipporti'ng frame mem- 1 here. The shocks-andstrainsimposed iup on thecrown block shaft during the operation of the derriek'tackle, i'n 'handling "the e xce s- 'Vide bearing block: of the" ctia ijicter' mentioned inwhich thehldck is provia'eew-itna cavity into which the-end i ofgithe shaft gma extend andiniw hich akeybiockiis dam-pea inflthec'avity against-the end ofitlie shafti for sively heavy lengths of, drill =p'ipe'and casing used in deep well,drillingfrequentlycause the *crown-block'shaft to crystallizeand breakw Wheni it is most necessary-tintthefderrick alignment with the corresponding sheaves of the traveling block and render the tackle in: ife'rre'd embodiment Of'mYinVeh'tibh is ill-(1 s i operative;

It'i's correspondinglyan obj'ectlof'iny inf 'vention to provide a crown b1oek'cons'truecrown bloc-k shaft have nee erred,

It is usually necessary that a; crown block have five orinore sheaves. These sheaves place the sheave with the worn bushing;

which is accomplished bv slippingthe crow'n 4 'block' shaft longitudinally through the sheaves; until the: worn i' sheav y moved. As t11'is-W'ork"innetrhe carried onat the; yep. ante derrick, it has been Me e-X ceedn1-g1ydifiicu1t by the, fact that the'entire b06301? sheaves and axle must be raised i distance of an inch or so to free the shaft from the support members i on Whi-cltitrests vbefore the shaft may be longitudinally moved. I

a tentively m Another-object, 6f

a Itis-a ftirthei-objectof-niy invention t em: fore, ltOPTOVlCiG acrown block m, whicii 'replacement of one or more sheaves 'o f theblock' W1 3 Vitte a novel bearingbl'ock which rests ohf I the siiipporti'means or frame of the: crownbloc iifaiid. supportsfoz'ie end of.. the -sheave shaft? It is also an 'chjiect'of'iny"invention topro- 1 vid e a: bearing block'ofthis'character having a 'n eans' which clamps the'shaft; from rotaitionfa nd. also restraints: the shat-t 'frorn aliial movement i aIbisanotherobjectofmy invention" to pro:

preventing rotationandf axiai' movement 6 f thehafti trated. the'dravvingsr Fg; 11 's afragment-ary view of the -up per end of theflwell drilling derrick showing" he crown meek of m ia entiem ome d thereon. V f 'Y '2 is a view-mien, enere-111m 25 20? Fig s i'sagview tal zenflontfie 1 iies 3@ f ports afcrown' hlock membod ifig theiea 5 turesfof invjiiiventfonif Theorem block inc'ludesalowe'riffame 13 and'aniipper frame 14:: 'r ei ewer famgi-smeme outer beams 16%and innei Beams IT'w-hih frese u'pon the a '1 are held rigidly in spaced relation by spacer water table 11. Rotatably mounted between the inner beams 17 in any preferred manner, is a pair of sheaves 18 which are used in light hoisting.

The upper frame 1% includes a pair of I- beams 20 which are disposed in crossing relation relative to the beams 16 and 17 and rest upon and are secured in any suitable manner to these beams. The ends of the beams 20 are held inspaoed relation by suitable spanner plates 23 against which the beams 20 are drawn by bolts 24. Adapted to rest upon the upper edges of the I-beams 20 are bracket blocks 25 which have sheave'shaft bores 26 which are adapted to be placed in alignment when the blocks 25 thus rest upon the beams 20. Formed in the upper outer portion of each of the blocks 25 is a cavity 27 for a purpose to be described later. Formed about the lower and inner portions of each block 25 are bottom flanges 28 and an inner flange 29..

Adapted to extend into the bores 26, when these are aligned, is a sheave shaft 30 which has key-ways 31 formed in the opposite ends thereof The sheave shaft 30 is retained against endwise movement in the blocks 25, and also against rotation in these blocks by key-blocks 34 which fit into the cavities 27 of the blocks 25 and the key-ways 31 of the shaft 30. Each of the key-blocks 34and the bracket blocks 25 have shallow channels 36 into which a U-bolt 37 extends downward so that its opposite ends pass through suitable holes in the bottom flanges 28 and through holes aligned therewith which are formed in an upper flange of a beam 20 upon which that bracket block is resting. Screwed upon the ends of this U-bolt are nuts 39 which are tightened up so as to rigidly force the key-block 3% against an upper face of the key-way 31 into which that block fits. This exerts a pressure directly downward against the shaft 30, which pressure is transmittedto thebracket block 25 at that end of the shaft so as to rigidly secure that bracket block against thebeam 20 on which it'rests. Each U-bolt 37 is therefore seen to have three functions, to .wit: holding the shaft 30 against endwise movement, holding the shaft 30 against rotation, and rigidly securing a bracket block 25 to one of the beams 20. V

Rotatably mounted on the shaft 30, so as to be disposed between the beams 20, is a series of sheaves 40, each of which is provided with a bushing 41. Disposed between each of the bracket blocks25 and the outermost sheave 40 adjacent thereto, and disposedbetween each adjacentpair of the sheaves 4:0,

is oneof a seriesof auxiliary shaft supporting plates 45. The plates 45 have openings through which the shaft 30 passes, and the lower ends of-these plates rest upon the beams 17 of the lower frame 13, as clearly shown in Figs. 2 and 3. r The lowerends of these plates tubes 46, placed between each adjacent pair of plates 45, and a bolt 48 which extends through the tubes t6 and holes in the plates 45 aligned therewith. v

The plates 45 serve two functions, that of centrally supporting the shaft30 in case this should fracture, and also providing a barrier impossible to stop working to make repairs until a suitable point in the drilling operations has been reached, where time can be takenfor dismantling the crown block 12' and replacing the broken shaft 30. The mounting of the shaft 30, so that this may be slipped out of the bearing blocks without bodily lifting the sheave and shaft assembly, is of great merit as the replacing of the shaft 30 or any of the sheaves 40 may be accomplished merely by driving wedges between the spacer tubes 46. and thebottom of the sheaves 4o soas to'lift the weight of. these sheaves. When this has beendone, and the nuts 39 loosened, so that the key-blocks 34' may be removed from the positions in which they are shown, the shaft 30 may be easily slipped in one'direction or the other so as to accomplish the-desired repairs;

I claim as my invention: V

1. In a crown block construction the combination of :a frame providing a pair of horizontally spaced supports; a normally station ary sheave shaft; means for positioning end portions of said shaft upon said supports; a plurality of sheaves rotatably mounted upon said shaft; and means rigidly supported upon said frame and engaging said shaft between.

adjacent pairsof said sheaves to support a portion of the load imposed upon said shaft through said sheaves. I

2. In acrown block construction the combination of: a frame providing a pair of horizontally spaced supports anormallyst-ationary sheave shaft; means for positioning end portions of said shaft upon said supports; a plurality of sheaves rotatably mounted'upon said shaft; andrelatively thin'plates rigidly supported upon said frame and engaging said shaft between-adjacent pairs of said sheaves tosupporta portion of the load imposed upon said shaft through said sheaves. v

3'. In a. crown block construction the combination of: a frame providing a pair of horizontally spaced supports; a normally stationary sheave shaft; means for positioning 5 ites-ass endportions ofsaid shaft upon said supports,

said shaft being longitudinally slidable in said means when so positioned; means preventing endwise movement of said shaft in said means; a pluralityofsheaves rotatably mounted upon said shaft and means rigidly supported upon said frameand engaging said shaft between adjacent pairsof'said sheaves to support a portion of *the load imposed upon saidshaft through said sheaves.-

4. In a crown block construction'the com bination of; a frame providing a pair of horizontally spaced supports; a normally stationary sheaveshaft; means for positioning end portions of said shaft upon said sup ports, said shaft being longitudinally slidable in said means when so positioned; means pre-, venting endwise movement of said shaft in 3 said means; a plurality of sheaves rotatably I ing to said bore; ,a key block adapted to rest ing said key block in said cavity,

mounted upon said shaft; and relatively thin platesrigidly supported upon said frame and engaging said shaftfbetween adjacent pairs of :said sheaves to support a portion of the load imposed upon said "shaft through said therefrom for clamping said key block in said cavity. I I

6. A shaft support for crown blocks comprising: a block having a bore for receiving a shaft, said block having a cavity connectin said cavity; and a U-shaped member extending over said key block and downward through the opening insaid block for clamp- 7. A shaft support for crown blocksfcomprising: a'block having abore for receiving a shaft, said block having a cavity connect- .ing to said bore; a key block'ad apted to rest a in'said cavity, said key block having an ex- 7 sheaves.

ternal'channehanda U-shaped member extending over said key block 'in said channel and downward through the opening in said block-for clamping said key block in said cavity.

'8. In acrown block constructiom'the' combination of: a frame; a shaft carried by said frame; sheaves rotatable on said shaft; and:

means rigidly secured to said frame and extending between said sheaves ina manner to a V shaft; piLI'iZltlDIlS arranged between said block construction the comform'partitions.

9. Ina crown I bination of: a frame adapted to be positioned 1 V ona derrick, said frame providing liorizon tally spaced supports; a shaft extending across said supports; means for connecting said shaft to said supports; sheaves on said shaft; and partitions arranged between said n pv o kmistresses, the em-1 b ti fet a fram a P e ie-be p si on d on a derrick, said frame prov-idinghorizon-s. tally spaced supports; a shaft. extend ng across said supports; means forcon'necting 1 said shaft to said supports; sheaves on sa d shaft; and partitions arranged between said sheaves, said partitions having openings through which said shaft extends. I

11. In a crownblock construction, tl econn bination of a frame adapted to bepositioned tally spaced supports; a shaft extending. across said supports; means for connecting said shaftto said supports; sheaves on said shaft; partitions arranged between said sheaves; and spaciiig'means for fixedly spacing said partitions betweensaid sheaves.

12. In a crown block construction, the combinati'on of: a frame adapted to be positioned on'a derrick, said frameproviding horizontally spaced supports; a shaft extending across saidsupports; meansfor connecting sa-id s'h'aft to said supports; sheaves on said shaft; partitions arranged between said sheaves, said' partitions having openings through which said shaft extends; and spachis. dsrris i s d r m P VT iI g-hQI-"iZ Dr ing meansfor fixedly spacing said partitions ,7

between said sheaves. v I

13. In a crown block construction, the com: bination of: a frame adapted to be positioned said shaft to said supports; sheaves on said shaft; and partitions arranged between said sheaves, said partitions being supported by" on a derrick, said frame providing horizon said frame and assisting said means to support said shaft.

' 14. In a crown block construction, thecombination of: a frame adapted to be positioned on a derrick, said frame providing horizontallyl spaced supports; a shaft extending across said supports; means for connecting said shaft 'to'said supports; sheaves on'said shaft; and partitions arranged between said sheaves, said partitions having openings through which said shaft extends and said partitions being supported by said frame and assisting said means to support said shaft.

bination of: a frame adapted to be positioned,

' 1.5 15. In a crown block construction, the com-" ona derrick,"said frame providing horizoiitally" spaced'supports; ,a shaft extending across said supports; means for connecting said shaft to saidsupports; sheaves Onsaid sheaves, said partitions being supported by said frame and assisting said means to supj port said shaft; and spacing means for fixedly. spacing said partitions between said sheaves. a 16, In a crown block construction, the comtally spaced supports; a shaft extending across said supports; means for connecting said shaft to said supports; sheaves on said shaft; partitions arranged between said sheaves, said partitions having openings through whlch sald shaft extends and said partitions being supported by said frame and asslstlng said means to support sald shaft; and spacing means forfixedlyspaclng said partitions between said sheaves.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 21st day of December, 1927. V

- EDWIN W. GOESER. 

